An approaching cold front helped trigger a series of thunderstorms with heavy downpours in southeastern Pennsylvania mainly during the morning and early afternoon of the 1st. Event totals reached 1 to 2 inches and caused some poor drainage flooding.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS PHI wrote it up.
An approaching cold front helped trigger a series of thunderstorms with heavy downpours in southeastern Pennsylvania mainly during the morning and early afternoon of the 1st. Event totals reached 1 to 2 inches and caused some poor drainage flooding.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Philadelphia/Mount Holly wrote its last area forecast discussion before the first event at Aug 1, 8:54 AM EST, 1 hour 6 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
954 AM EDT THU AUG 1 2013
.SYNOPSIS...
A WARM FRONT WILL LIFT NORTHWARD TODAY, FOLLOWED BY A COLD FRONT
MOVING THROUGH OUR AREA LATE TONIGHT. HIGH PRESSURE WILL THEN BUILD
IN FROM THE SOUTHWEST ON FRIDAY. A SECONDARY COLD FRONT SHOULD THEN
ARRIVE LATE SATURDAY NIGHT. A CANADIAN HIGH PRESSURE SYSTEM WILL
THEN BUILD OVER THE REGION LATER SUNDAY INTO MONDAY BEFORE QUICKLY
DEPARTING. A PAIR OF FRONTAL SYSTEMS SHOULD THEN MOVE THROUGH THE
AREA TUESDAY AND WEDNESDAY.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
A WARM FRONT WILL LIFT NORTH THROUGH PORTIONS OF THE CWA TODAY AS A
SURFACE LOW TRACKS THROUGH EASTERN PENNSYLVANIA. AS BOTH THE
SOUTHERLY FLOW AND WAA INCREASES THROUGH THE LOWER LEVELS, THE WARM
FRONT TRACKS THROUGH THE REGION, AND THE MID LEVEL TROUGH GOES
NEGATIVE, SHOWERS WILL INTENSIFY ESPECIALLY THIS AFTERNOON. THE
INITIAL SURGE IN SHOWERS THIS MORNING APPEARS TO BE TIED TO A
THETA-E SURGE UP AND OVER THE WARM FRONT. THERE MAY BE A BREAK
BEHIND THIS, OR AT LEAST A SCATTERING OUT OF THE SHOWERS FOR A TIME,
THEN ADDITIONAL DEVELOPMENT IS ANTICIPATED ESPECIALLY THIS AFTERNOON.
WITH A WEALTH OF CLOUDS, HIGH TEMPERATURES WILL BE HELD DOWN AND SO
WILL THE INSTABILITY. THE OVERALL SEVERE WEATHER THREAT STILL
APPEARS TO BE LOW WITH THE FORECAST BULK SHEAR AVERAGING 25 KNOTS
AND MEAGER LOW/MID LEVEL LAPSE RATES. IF A FEW CONVECTIVE CELLS THIS
AFTERNOON CAN BECOME STRONG ENOUGH, THEN PERHAPS A LOCAL STRONG WIND
GUST CAN OCCUR WITH MOSTLY PRECIPITATION LOADING OF THE DOWNDRAFT
BEING THE MAIN DRIVING FORCE. INTERESTINGLY ENOUGH, THE 12Z
STERLING, VA RAOB DOES SHOW AROUND 100 M2/S2 OF HELICITY /LOW-LEVEL
SHEAR/. THIS COULD RESULT IN SOME TRANSIENT ROTATION IF WE CAN
GET SOME STRONGER CONVECTIVE ELEMENTS. REGARDING THE FLOODING
ASPECT, CHECK OUT THE HYDROLOGY SECTION BELOW.
THE HOURLY GRIDS WERE ADJUSTED, WHICH INCLUDED SOMEWHAT LOWER
TEMPERATURES THUS FAR GIVEN THE ONGOING SHOWERS. NO MAJOR CHANGES
WERE MADE TO THE HIGH TEMPERATURES ATTM.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM FRIDAY/...
THE COLD FRONT MOVES THROUGH THE CWA TONIGHT AND SHOULD CLEAR THE
COAST BY DAYBREAK. POPS DECREASE FROM WEST TO EAST THROUGH THE
NIGHT.
WITH THE FRONT TO OUR EAST BY DAYBREAK, WINDS WILL SHIFT TO
THE WEST OR NORTHWEST, BUT REMAIN 10 MPH OR LESS.
LOWS WILL RANGE IN THE MID 50S NORTH AND WEST TO THE MID TO UPPER
60S ELSEWHERE.
&&
.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
THE GFS INITIALIZATION OF THE SOUTHERN STREAM SYSTEM WAS NOT
STELLAR, BUT DID BETTER THAN THE WRF-NMMB IN THE UPPER MIDWEST FROM
WHERE OUR LONG TERM SEGMENT BEGINS. OVERALL BOTH MODELS
INITIALIZED QUITE WELL AT 850MB WITH A SLIGHT EDGE TO THE GFS AT
925MB. THE WRF-NMMB HAS HAD A BUMPY RIDE IN THE LONG TERM PERIOD
AND WAS GIVEN LESS WEIGHT THAN AVERAGE. FOR ACCURACY OR NOT THE
GFS HAS BEEN MORE CONSISTENT THAN THE WRF-NMMB OR THE CAN GGEM.
THIS LONG TERM BLENDED THE GFS WITH AS MUCH OF THE NEW ECMWF WE
COULD SEE IN TIME.
THE OVERALL PREMISE OF THE LONG TERM HAS NOT CHANGED. A CLOSED LOW
OR TROUGH IS EXPECTED TO LINGER OVER EASTERN CANADA WITH THE 500MB
RIDGE HEAT RIDGE STUCK OVER THE SOUTHERN ROCKIES. A COUPLE OF
SYSTEMS WILL GIVE US PCPN CHANCES, WITH RATHER PLEASANT DAYS AROUND
THEM. OVERALL IT WILL BE TOUGH TO GET MUCH WARMER THAN NORMAL GIVEN
THE PATTERN.
THE COLD FRONT SHOULD CLEAR OUR CWA EARLY ON FRIDAY. MOST OF OUR CWA
IS EXPECTED TO BE PROTECTED FROM PRECIPITATION BY A DEVELOPING CAP.
THE EXCEPTION COULD BE FAR NORTH WHERE SOME RATHER STRONG LOOKING
SHORT WAVES SHOULD PREVENT A CAP. BECAUSE THE MLCAPE IS SO MEAGER,
WE WILL KEEP PCPN AS SHOWERS (NO THUNDER) AND FOR NOW KEEP MENTION TO
THE HIGHER TERRAIN IN THE POCONOS. STAT GUIDANCE HAS BEEN PRETTY
CONSISTENT WITH MAX TEMPS FOR FRIDAY AND DID NOT DIFFER MUCH.
FRIDAY NIGHT DIFFICULT DECISION TO LEAVE DRY FOR NOW. THE MODELS
HAVE NOT BEEN CONSISTENT WITH BOOMING CONVECTION FARTHER TO THE WEST
IN THE SAME AREAS AND OR SAME EVOLUTION ONCE IT DEVELOPS. ALOFT THEY
DO NOT SUPPORT THE MAINTENANCE OF THUNDER IF THEY WERE TO GET
INTO OUR CWA. GIVEN WHERE THE SUPPORT FALLS APART TO OUR WEST AND
THE DP/DT LESSENING TREND. WE KEPT IT DRY. COMPROMISE FOR NOW WAS
TO START MENTION OF PCPN OFF THE BAT ON SATURDAY MORNING. CLOUDS
WILL COMPLICATE MIN TEMPS AND WE MAY BE A BIT TOO GIDDY DROPPING
THEM TO RELATIVELY COMFORTABLE LEVELS IN OUTLYING AREAS.
SATURDAY COULD BE ONE OF THOSE STEALTH SEVERE WEATHER DAYS. THERE
ARE COMPLICATIONS IF THIS CAN COME TO FRUITION. WE SHOULD HAVE MORE
THAN ADEQUATE BULK SHEAR AND FCST DCAPES OF 1000-1500J (EVEN THE
SOUNDING LOADED GUN LOOK) WOULD ENHANCE DOWNDRAFTS. THE LOCATION
OF THE JET (WHICH IS AIDING THE BULK SHEAR) OVER OUR CWA WILL NOT
HURT. THERE ARE SOME NEGATIVE FACTORS THAT WOULD HAVE TO LESSEN.
WE WILL HAVE TO WATCH THE DEW POINT RECOVERY AS FCST MLCAPES ARE
NOW LESS THAN 1000J. COULD IT BE A CASE OF TOOOOOOO MUCH SHEAR
GIVEN THE LOW CAPE ENVIRONMENT? THE FCST WESTERLY FLOW (THE SHORT
WAVES ARE RELATIVELY WEAK) ABOVE THE BOUNDARY LAYER IS NOT A STORM
RELATIVE PLUS. THE FCST MID LEVEL LAPSE RATES ARE NOT GOING TO WIN
ANY AWARDS EITHER AS MOST OF THE MOISTURE IS ABOVE 850MB. THIS IS
ANOTHER COMPLICATING FACTOR AS TO HOW MUCH SUNSHINE AND THUS HOW
HIGH WILL TEMPS GET. JUST FROM THE LIST THERE ARE MORE NEGATIVES
THAN POSITIVES AND FOR NOW WILL KEEP THE GRIDS AS SIMPLE THUNDER.
THERE SHOULD BE A BETTER CHANCE SOUTH VS NORTH BASED ON TEMP AND
DEW POINT RECOVERY. THIS DOES NOT LOOK LIKE A CASE WHERE THE BULK
SHEAR FALLS OFF A CLIFF NORTH TO SOUTH ACROSS OUR CWA.
HIGHER CHANCES SHOULD THEN DIP FARTHER TO THE SOUTH IN OUR CWA ON
SATURDAY NIGHT. WE SHAVED BACK THE LINGERING LOW CHANCE ON SUNDAY
NOW MORE SO JUST IN THE SOUTHEASTERN HALF OF OUR CWA BASED ON MODEL
TRENDS.
NO CHANGE TO SUNDAY NIGHT AND MONDAY AS HIGH PRESSURE BRIEFLY BUILDS
INTO OUR CWA WITH SOME FRESH CANADIAN AIR. THIS THOUGH SHOULD BE
FLEETING AS IT EXITS QUICKLY AS WE REMAIN UNDER A RELATIVE BRISK
FLOW ALOFT FOR EARLY AUGUST. TIMING DIFFERENCES AT THIS NATURAL
TEMPORAL TIME FRAME START CROPPING WITH THE NEXT TWO SYSTEMS.
WHILE THERE IS BETTER CONSENSUS ABOUT TUESDAY, THERE ARE
DIFFERENCES AS TO WHETHER THE NEXT ONE WOULD BE WEDNESDAY OR
THURSDAY. NO BIG CHANGES WERE MADE AT THIS JUNCTURE.
&&
.AVIATION /14Z THURSDAY THROUGH MONDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG, KILG,
KMIV, KACY AND SURROUNDING AREAS.
REST OF TODAY...VFR/MVFR CEILINGS WITH TIMES OF IFR CEILINGS AS
SHOWERS CONTINUE. THE LOCAL CEILINGS MAY TEND TO BOUNCE AROUND AT
TIMES. THE VISIBILITIES WILL BE GREATLY REDUCED DURING TIMES OF
HEAVY RAIN AND A THUNDERSTORM. SOUTHERLY WINDS GENERALLY AROUND 10
KNOTS.
TONIGHT...MVFR/IFR IN SHOWERS AND SCATTERED THUNDERSTORMS. THE
PRECIPITATION IS EXPECTED TO END FROM WEST TO EAST LATE. LOCAL FOG
IS POSSIBLE BEFORE THE COLD FRONTAL PASSAGE. OVERALL THOUGH, VFR IS
EXPECTED TOWARD MORNING.
OUTLOOK...
FRIDAY AND FRIDAY NIGHT...VFR. MVFR CONDITIONS POSSIBLE LATE.
SATURDAY AND SATURDAY NIGHT...WHILE PREDOMINATELY VFR, SOME
MVFR TO ISOLATED IFR CONDITIONS POSSIBLE IN SCATTERED SHOWERS
AND THUNDERSTORMS.
SUNDAY...OVERALL VFR. MVFR POSSIBLE EARLY IN THUNDERSTORMS SOUTH.
SUNDAY NIGHT AND MONDAY...VFR.
&&
.MARINE...
SOUTH TO SOUTHWEST WINDS WILL INCREASE TODAY AS A WARM FRONT SHIFTS
NORTH. THAT SAID, GUSTS UP TO 20 KT CAN BE EXPECTED. SEAS ARE
RUNNING ABOUT 2 FEET, BUT WILL ALSO SEE A BUMP LATER TODAY AND THIS
EVENING. EXPECTING THEM TO TOP OUT AT 4 FEET LATE THIS AFTERNOON AND
EARLY TONIGHT. WAVE WATCH APPEARS OVERDONE WITH THE 5 FOOTERS. WILL
HOLD OFF ON ANY HEADLINES AND NOT GO WITH A SCA.
SHOWERS AND THUNDERSTORMS EXPECTED TODAY AND TONIGHT. COULD SEE TWO
ROUNDS RATHER THAN PRECIPITATION ALL DAY. THE FIRST ROUND SHOULD
COME THIS MORNING, FOLLOWED BY A BREAK, FOLLOWED BY MORE SHOWERS
AND THUNDER THIS AFTERNOON AND EVENING.
OUTLOOK...
SUB-SMALL CRAFT ADVISORY CRITERIA IS EXPECTED TO PREVAIL THROUGH
MONDAY. SOUTHERLY SWELLS ON FRIDAY SHOULD SUBSIDE AS THE COLD FRONT
MOVES THROUGH. THE BRISKER WESTERLY FLOW LATE FRIDAY NIGHT INTO
SATURDAY PRECEDING THE NEXT COLD FRONT IS EXPECTED TO FALL SHORT OF
SMALL CRAFT ADVISORY CRITERIA. THEN AS HIGH PRESSURE COMES CLOSER
SUNDAY AND REACHES THE MARINE AREA ON MONDAY WE ARE EXPECTING TO
BE WELL BELOW SMALL CRAFT ADVISORY CRITERIA.
&&
.HYDROLOGY...
GENERAL RAINFALL AMOUNTS SHOULD AVERAGE 1.0 TO 1.5 INCHES THROUGH
TONIGHT. SOME LOCALIZED AMOUNTS REACHING UP TO 4.0 INCHES ARE
POSSIBLE.
A FLASH FLOOD WATCH IS IN EFFECT THROUGH MIDNIGHT. WE'VE BEEN ON
SOMEWHAT OF AN ISLAND THIS SUMMER THAN SURROUNDING CWA'S. THE
MARFC DEPARTURE FROM AVERAGE MAPS TELL THE STORY. A FEW LOCALES
HAVE EXPERIENCED RECORD OR NEAR RECORD RAINFALL THIS SUMMER, E.G.
PHILLY BROKE MONTHLY RECORDS IN BOTH JUNE AND JULY. PHILLY IS
ACTUALLY APPROACHING THE WETTEST METEOROLOGICAL SUMMER ON RECORD.
IN A MORE TYPICAL SUMMER, WHAT'S EXPECTED TODAY PROBABLY WOULD NOT
HAVE INDUCED A WATCH. BUT THIS IS NOT A TYPICAL SUMMER!
UNFORTUNATELY WE'RE PRIMED.
EXPECT POOR DRAINAGE FLOODING AND PONDING OF WATER ON SOME
ROADWAYS, WHICH WILL SLOW TRAVEL AT TIMES. SMALLER STREAMS AND
CREEKS COULD LOCALLY FLOOD, ESPECIALLY IF SIMILAR AREAS THAT HAD
VERY HEAVY RAIN ON SUNDAY EXPERIENCE IT AGAIN INTO THIS EVENING.
IF THE RAIN FALLS HEAVY ENOUGH IN A SHORT PERIOD OF TIME, THE
THREAT FOR LOCAL FLASH FLOODING WILL INCREASE.
&&
.RIP CURRENTS...
THERE IS A MODERATE RISK OF RIP CURRENTS ALONG THE NJ COAST WITH THE
SOUTHERLY FLOW AND LONG PERIOD SWELLS.
&&
.PHI WATCHES/WARNINGS/ADVISORIES...
PA...FLASH FLOOD WATCH THROUGH THIS EVENING FOR PAZ054-055-060>062-
070-071-101>106.
NJ...FLASH FLOOD WATCH THROUGH THIS EVENING FOR NJZ001-007>010-012-
015>019.
DE...FLASH FLOOD WATCH THROUGH THIS EVENING FOR DEZ001.
MD...FLASH FLOOD WATCH THROUGH THIS EVENING FOR MDZ008.
MARINE...NONE.
&&
SYNOPSIS...GIGI/GORSE/MIKETTA
NEAR TERM...GORSE
SHORT TERM...KRUZDLO
LONG TERM...GIGI
AVIATION...GIGI/GORSE/KRUZDLO
MARINE...GIGI/KRUZDLO
HYDROLOGY...GORSE/KRUZDLO
RIP CURRENTS...HEAVENER/KRUZDLOHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 403 AM EDT THU AUG 1 2013 DEZ001-MDZ008-NJZ001-007>010-012-015>019-PAZ054-055-060>062-070-071- 101>106-020815- NEW CASTLE-CECIL-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX- MERCER-SALEM-GLOUCESTER-CAMDEN-NORTHWESTERN BURLINGTON-CARBON-MONROE- BERKS-LEHIGH-NORTHAMPTON-DELAWARE-PHILADELPHIA-WESTERN CHESTER- EASTERN CHESTER-WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS- LOWER BUCKS- 403 AM EDT THU AUG 1 2013 ...FLASH FLOOD WATCH IN EFFECT FROM 10 AM EDT THIS MORNING THROUGH THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...SOUTHERN NEW JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND SOUTHEAST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE IS A CHANCE FOR STRONG THUNDERSTORMS ON SATURDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. DEZ002-003-MDZ012-015-019-020-NJZ013-020>023-027-020815- KENT-INLAND SUSSEX-KENT MD-QUEEN ANNES-TALBOT-CAROLINE- WESTERN MONMOUTH-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY- SOUTHEASTERN BURLINGTON- 403 AM EDT THU AUG 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...TODAY AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE EXPECTED INTO THIS EVENING, SOME OF WHICH SHOULD PRODUCE HEAVY RAINFALL. AS A RESULT, THERE IS THE POTENTIAL FOR LOCALIZED POOR DRAINAGE AND FIELD FLOODING AS WELL AS A CHANCE OF SMALLER STREAM FLOODING. AT THE LEAST EXPECT THE RAIN TO IMPACT TRAVEL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE IS A CHANCE FOR STRONG THUNDERSTORMS ON SATURDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. NJZ014-024>026-020815- EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY-COASTAL ATLANTIC- COASTAL OCEAN- 403 AM EDT THU AUG 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW JERSEY AND SOUTHERN NEW JERSEY. .DAY ONE...TODAY AND TONIGHT. THERE IS A MODERATE RISK OF RIP CURRENTS THROUGH THIS EVENING. SHOWERS AND THUNDERSTORMS ARE EXPECTED INTO THIS EVENING, SOME OF WHICH SHOULD PRODUCE HEAVY RAINFALL. AS A RESULT, THERE IS THE POTENTIAL FOR LOCALIZED POOR DRAINAGE FLOODING ESPECIALLY IF THE HEAVY RAIN COINCIDES WITH HIGH TIDE. AT THE LEAST EXPECT THE RAIN TO IMPACT TRAVEL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE IS A CHANCE FOR STRONG THUNDERSTORMS ON SATURDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. DEZ004-020815- DELAWARE BEACHES- 403 AM EDT THU AUG 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE. .DAY ONE...TODAY AND TONIGHT. SHOWERS AND THUNDERSTORMS ARE EXPECTED INTO THIS EVENING, SOME OF WHICH SHOULD PRODUCE HEAVY RAINFALL. AS A RESULT, THERE IS THE POTENTIAL FOR LOCALIZED POOR DRAINAGE FLOODING ESPECIALLY IF THE HEAVY RAIN COINCIDES WITH HIGH TIDE. AT THE LEAST EXPECT THE RAIN TO IMPACT TRAVEL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE IS A CHANCE FOR STRONG THUNDERSTORMS ON SATURDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. ANZ430-431-450>455-020815- DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE- COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM- COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM- COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM- COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM- COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM- 403 AM EDT THU AUG 1 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND DELAWARE BAY WATERS. .DAY ONE...TODAY AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE IS A CHANCE FOR STRONG THUNDERSTORMS ON SATURDAY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
1 heavy rain. Local standard time, as filed.
Heavy rain caused some poor drainage flooding along Montgomery Avenue in West Chester. One vehicle became disabled in the flood waters. Event precipitation totals in West Chester were 1.86 inches and 1.35 inches respectively. No serious injuries were reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2013Every state in 2013This day in weather historyWarnings in Pennsylvania, August 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 475126.